Thomas Smith or Smyth (June 1609 – 2 October 1642) was an English politician who sat in the House of Commons at various times between 1628 and 1642.

Smith, of Long Ashton in Somerset, was the eldest son of Sir Hugh Smith (1574–1627) and his wife Elizabeth Gorges, a daughter of Thomas Gorges of Lanford and Helena Snakenborg, Marchioness of Northampton.

He was head of wealthy Somerset family, descended from a 16th-century Mayor of Bristol.

He was elected MP for Bridgwater again in the Long Parliament from February 1641 until August 1642, when he was disabled from sitting for his sympathies.

He joined the Marquess of Hertford's royal army, and was serving with that force when he died at Cardiff in October 1642.